*{
    margin: 0;
    padding: 0;
}
body{
    font-family: '微软雅黑';
    font-size: 14px;
}
a{
    text-decoration: none;
    font-size: 14px;
    color: #3f3d3d;
    /* 设置字间距 */
    letter-spacing: 1px;
}
a:hover{
    color: red;
}
ul{
    list-style: none;
}
li{
    list-style: none;
}
img{
    border: none;
    /* 去掉图片下方的缝隙 */
    vertical-align: middle;
}